hadaway



l.' B. HADAWAY.

vAMP TmMMING MACHINE.

APPLICATION FILED DEC-31.1917- 1,316,716. Pamedsepn 23,1919.

TmcoLuMnm PLANuarzM-n co., WASHINGTON, n. c.

uNiTnp sTATEs PATENT ormoni.

JOHN B. I-IADAWAY, OF SWAMPSCOTT, MASSACHUSETTS, ASSIGNOR TO `TJ'NIT'ED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF `NEW JERSEY.

VAMP-TRIMMING MACHINE.

Specification of Letters Patent.`

Application led December 31, 1917.. Serial No. 209,645.

To all whom it may concern: s

Be it known that I, JOHN B. HADAWAY,

a citizen of the United States, residing at- Siwampscott, in the county of .Essex and State of Massachusetts, have invented certain new and useful Improvements in Vamp- Trimming Machines; and I do hereby declare the following to |be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

In ythe manufacture of slices, and particu- 'larly of welted shoes, after the shoe is lasted it has been found that the edges of the vamp and lining project to such an extent as to interfere with the operation of the looper and other instrumentalities `of the inseam sewing machine such as employed in the operation of sewing the upper and the welt on the insole. It is, therefore, customary to trim the edges of the vamp and lining before the Welting operation takes place. I-Ieretofore, this trimming operation has been performed by a trimming machine having a rapidly vibrating knife coperating with a hard steel roll, rotated by a constantly rotating shaft and having knurled sides to feed the shoe for successive opera-' tions of the knife as said shoe is pressed against the roll bv the operator. Such a machine is illustrated and fully described in the.

patent to Hadaway, 922,697, May 25, 1909, this invention being in the nature of an improvement of the device shown therein.

In said patent to Hadaway the roll cooperating with the vibrating knife is of frusto-conical shape, the upper and larger face of which forms the cuttingedge with which said vibrating `knife cooperates. The lower and smaller face of said roll rests against the insole of the shoe during the trimming operation and is made smaller than the upper face in order to facilitate .5 i. the operation in a narrow-toed shoe. There is, therefore, only one face of the roll adapted to cooperate ywith the reciprocating cutting knife. This single cutting face when in constant use soon becomes dull, thus lessening its efiiciencv and necessitating its removal for grinding, said roll being mounted sothat it may be removed for such purpose. n It has also been found that it is difficult to grind the dull edge of the shearing knife and produce a smooth and Hat surface on the upper face, which is ground off in producing a sharp shearing edge. This can be done accurately only by a very s-killed workman, and the tendency to produce by grinding a rough and uneven face has proven a considerable annoyance. i

A further undesirable feature of theold form of solid knife will be apparent when it is understood that said knife is also employed as a distance gage to gage the distance from the insole to the point at which the edges of the` vamp and lining are trimmed.` The known form of Ishearing knife, after being ground one or moretimes, is reduced in thickness and hence causes the edges of the vamp and lining to be trimmed too close to the shoe.

Accordingly, it is an Iobject of this inven-` tion to provide a shearing knife for cooperating with the trimming knife, having a plurality `of cutting surfaces so that'when one 'becomes dull another may [be used, thus eliminating' the objectionable feature of grinding when a sharp cutting edge is desired. To this end a feature of the inventiony described and claimed, the advantages of which will be obvious to those skilled in the art, and which, except` as defined in the claims, may be embodied in other .types of trimming machines used in the manufacture of shoes. i

The feature of the invention will be understood from an inspection of the vaccompanying drawings and the following detailed description of the mechanism illustrated therein. Y l

In the drawings Figure l is a sectional view looking from the side of the machine on a plane passing through the vertical shaft of the guiding roll, a `portion ofthe machine frame being 4brokena'way, and the guiding roll and shearing disk being shown in elevation. Fig. 2 is a: detailed sectional view through the shearing disk and guiding `Patentamt sept. as, 1ere.

roll. Fig. 8 is a plan view of the shearing disk.

The guiding roll 1, to be more fully described hereinafter, engages the lining and directs the vamp and lining between the cutting edges of the trimmingknives and, as shown, is arranged with its lower end directed downwardly so as to engage the sole of a shoe placed in the machine. The 4roll is secured to the lower end of a vertical shaft 2 by being screw-threaded thereon, the lower end of the shaft being provided with a screw-threaded portion engaged by said roll. The roll is rotated constantly, at a peripheral speed, somewhat in excess of the speed at which the shoe is fed, and to enable the roll to exert an outward stretching action on the lining it is provided on the peripheral surface with spiral ribs or corrugations as shown in Fig. 1. The shaft 2 is mounted in vbearings in the over-hanging head 3 of the machine frame and is constantly rotated by means of a worm-wheel 5 engaging the worm gear 6, said worm gear being constantly driven from the main driving' shaft 4t by means not shown herein. The worm-wheel 5 is held against longitudinal movement between the upper end of the bearing for the shaft 2 and an adjustable sleeve 7 having screw-'threaded engagement with the frame of the machine as indicated in Fig. 1.

Coiperating with said guide roll to trim the vamp and lining is the knife 8. The blade of this knife is curved in the are of a circle and is secured by means ofva bolt 9 to a knife carrier 10. This carrier is pivotally mounted upon the frame of the machine by means of pivot pins fully illustrated and described in said patent to Hadaway. During the operation of the machine a rapid vibrating movement is imparted to the knife carrier by means (not shown) driven from the main driving shaft.

Coperatinp, with said reciprocating knife is a vamp bending device and knife guard 11, which acts to bend inwardly any out-- f wardly projecting portions of the vamp and lining and also acts to prevent the knife striking any of the lasting tacks. This vamp bending device 11, as shown, consists of a curved leaf-spring provided at its free end with an upturned portion 12 and a laterally extending portion 13, the portion 12 being so located as to engage the vamp before it reaches the knives and the portion ,13 extending beneath the vibrating trimming knife. The other end of the spring 11 is bent downwardly and is provided with a slot, through which passes a clamping screw 15 by which the spring is secured to an oscillating carrier 14, the slot permitting a limited vertical adjustment of the spring 11. The above described spring 11 is given a rapid vibrating movement by means of an Associated with the vibrating knife 8 is a knifevguide 18, held n place on the frame i of the machine by a clamping screw 19, passing through a slot in the knife guard and permitting a limited vertical adjustment so that said knife guide may be accurately positioned relative to the knife. i

The above described rmechanism forms no part of the present invention, and its operation will be more clearly understood from an inspection of the patent to Hadaway, above referred to. The construction and operation of only so much of this old mechanismis described as to enable a clear understanding of devices which constitute this invention.

' According to this invention, there is provided on the lower end of the rotating shaft 2 a projecting stud of smaller diameter than the shaft. rlhe stud is indicated at 21, and fitting snugly around said Vstud is a thin steel shearing disk 20, having a central aperture to fit around the stud. The shearing disk 2O is of less thickness than the length of the stud 21, consequently the stud 21 passes through the disk and extends slightly beyond said disk-at the lower side. rlhe guiding roll 1, above referred to, has in its upper face a circular depression 23,` such depression being of slightly greater depth than the portion of said stud which p rojects below the lower face of the shearing disk. This depression, or socket, is adapted to fit over that portion of the stud project ing below the disk and is made of greater depth than the projecting portion of theV stud in order that the guide roll, which is employed as a nut to clamp the shearing disk in position, may be screwed tightly against said disk. Integral with the shaft 2 and extending below the stud 21 is a threaded projecting end 22, this threaded portion being of less diameter than the stud on which the disk is` mounted. Said projecting end is engaged by the ,threaded portion of the guide roll 1 so that said guide roll may be adjusted to bring its upper face into engagement with the lower face of the disk 20 to secure said disk in position. The guide roll, 1 has passing through it, as indicated at 25, two holes, which are threaded for engagement withV set-screws 26, which are adapted to be screwed down in said holes until the ends of said set screws engage the lower surface of the shearing disk 20; the purpose of said set screws being to hold said shearing disk more securely fixed for rotation withthe shaft 2 and guide roll l. The

shaft 2, at its lower end, has a shoulder formed by the projecting stud 21, and by the mechanism above described the shearing disk 20 is clamped between said shoulder and the upper face of the guide roll l so as to rotate with the shaft 2. The shearing disk 2O is a thin steel disk, its upper and lower faces having the same diameter and either one of which may coperate with the trimming knife 8. The guide roll 1 having threaded engagement with the lower end of the shaft 2 can be removed, and the disk 2O may also be removed from the stud 2l and its position on said stud may be reversed. By means of this construction the operator may, when one cutting edge of the shearing disk vbecomes dull, reverse its position and so use the other cutting face.

It will be evident from the above description that when the shearing knife illustrated in this device becomes dull, a sharp shearing edge may be obtained by mere reversal of the position of such shearing knife, thus eliminating any grinding of said shearing knife. Also the shearing disk when worn out may be replaced b-y a new disk `without renewing the roll.

The invention having been thus described, what is claimed is Yl. A trimming machine for use in the manufacture of shoes having, in combination, a work guiding device arranged to engage at one end with the surface of a shoe sole and form a distance gage to determine the distance from the surface of the sole at which a trimming cut should be made, a shearing disk removably mounted with one face adjacent the other end of said guiding device and held in place by said device, and

Copies of this patent may be obtained for ve cents each, by addressing the a trimming knife working across the other face of said shearing disk.

2. A trimming machine for use in the manufacture of shoes having, in combina tion, a work guiding device arranged to engage at one end with the surface of a shoe sole and form a distance gage to determine the distance from the surface of the sole at which a trimming cut is to be made, a shearing disk having two cutting faces and removably and reversihly mounted with one face adjacent the other end of said guiding device and held in place by said device, and a trimming knife working across the other face of said shearing disk.

3. A vamp trimming machine having, in combination, a guide roll for the vamp and lining having one end directed toward the sole of the shoe placed in the machine, a shearing disk removably mounted with one face adjacent the other'end of said guiding roll and held in place by said roll, and a vibrating trimming knife working across the other face of said shearing disk to trim the vamp and lining. y

4f. A vamp trimming machine having, in combination, a guide roll for the vamp and lining, having one end directed toward the sole of the shoe placed in the machine, a shearing disk having two cutting faces and removably and reversibly mounted with one face adjacent the other end of saidguiding roll and held in place by said roll, and a vibrating trimming knife working across the other face of said shearing disk to trim the vamp and lining, said shearing disk and guiding roll forming a constant distance gage to determine the distance from the sole of the shoe at which the vamp and lining are trimmed.

JOHN B. HADAWAY.

Commissioner of Patents,

Washington, D. C. 

